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Demonstration of Sparse Signal Reconstruction for Radar Imaging of Ice Sheets

Heister, Anton and Scheiber, Rolf (2017) Demonstration of Sparse Signal Reconstruction for Radar Imaging of Ice Sheets. European Geosciences Union (EGU), 2017-04-24 - 2017-04-26, Vienna, Austria.

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Conventional processing of ice-sounder data produces 2-D images of the ice sheet and bed, where the two dimensions are along-track and depth, while the across-track direction is fixed to nadir. The 2-D images contain information about the topography and radar reflectivity of the ice sheet’s surface, bed, and internal layers in the along-track direction. Having multiple antenna phase centers in the across-track direction enables the production of 3-D images of the ice sheet and bed. Compared to conventional 2-D images, these contain additional information about the surface and bed topography, and orientation of the internal layers over a swath in the across-track direction. We apply a 3-D SAR tomographic ice-sounding method based on sparse signal reconstruction to the data collected by Center for Remote Sensing of Ice Sheets (CReSIS) in 2008 in Greenland using their multichannel coherent radar depth sounder (MCoRDS). The MCoRDS data have 16 effective phase centers which allows us to better understand the performance of the method. Lastly we offer sparsity improvement by including wavelet dictionaries into the reconstruction.The results show improved scene feature resolvability in across-track direction compared to MVDR beamformer.

Item URL in elib:https://elib.dlr.de/111950/
Document Type:Conference or Workshop Item (Poster)
Title:Demonstration of Sparse Signal Reconstruction for Radar Imaging of Ice Sheets
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Scheiber, RolfUNSPECIFIEDhttps://orcid.org/0000-0002-6833-4897UNSPECIFIED
Date:30 January 2017
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:SAR tomography, ice sounding, sparse signal reconstruction
Event Title:European Geosciences Union (EGU)
Event Location:Vienna, Austria
Event Type:international Conference
Event Dates:2017-04-24 - 2017-04-26
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - SAR methods
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > SAR Technology
Deposited By: Heister, Anton
Deposited On:24 Apr 2017 07:39
Last Modified:31 Jul 2019 20:09

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